Lombok @Data error

java: cannot find symbol
  symbol:   method getFirstName()
  location: variable customerDto of type dto.CustomerDto

private Customer mapToCustomer(CustomerDto customerDto) throws Exception {
        if(customerDto.getFirstName().isEmpty() || customerDto.getLastName().isEmpty() || customerDto.getEmail().isEmpty() || customerDto.getPassword().isEmpty() || customerDto.getRole().isEmpty()) {
            throw new Exception("All fields must be filled");
        }

        return Customer.builder()
                .firstName(customerDto.getFirstName())
                .lastName(customerDto.getLastName())
                .email(customerDto.getEmail())
                .password(customerDto.getPassword())
                .role(customerDto.getRole())
                .build();
    }

@Data
@Builder
@NoArgsConstructor
@AllArgsConstructor
public class CustomerDto {
    private Long id;
    private String firstName;
    private String lastName;
    private String role;
    private String email;
    private String password;
    private LocalDateTime createdAt;
    private LocalDateTime updatedAt;
}